Hi all, I have some questions about photons. I'm at the end of the semester of PhysII in the quantum mechanics section and I'm trying to understand how photons determine the property of an electromagnetic wave. The way the text book describes it the electromagnetic waves are made up of photons, and the frequency of light or the wave is actually the frequency of photons themselves. Or is it that the waves are made up of photons and thre frequency of the wave is determined by varying density of photons? I guess i'm confussed especially when it comes to radio waves. If a wave is propagated because of an oscillation of current how can an antenna emmit a continuous "stream" of photons at that frequency of current oscillation?